Annual report pursuant to Section 13 and 15(d)

Business & Basis of Presentation (Details)

v2.4.1.9
Business & Basis of Presentation (Details)
12 Months Ended
Dec. 31, 2014
segment
Line
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Number of satellite radio systems 2siri_NumberOfSatelliteRadioSystems
Number of reportable segments 1us-gaap_NumberOfReportableSegments
Minimum [Member]  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Length of prepaid subscriptions, term 3 months
Maximum [Member]  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Length of prepaid subscriptions, term 12 months